In-line Thermography for Reliable Hot Spot Detection and Process Control

Ramspeck, K.; Schenk, Stefan; Duphorn, Denny; Metz, A.; Meixner, Michael

doi:10.1016/j.egypro.2014.08.097

Cited by 16 publications

(8 citation statements)

References 11 publications

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“…The observations shown a direct correlation between areas of high impurity concentration and hot spot heating, as well as the components of these impurities: oxygen, carbon, iron and platinum. According to that, Ramspeck et al [99] developed a setup oriented to process control of PV cells. The method consists in applying voltage to the cell and force it to work on reverse conditions, and then create a thermography of the cell, all in less than half a second.…”

Section: Hot Spotsmentioning

confidence: 99%

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Survey of maintenance management for photovoltaic power systems

Gonzalo

Marugán

Márquez

2020

Renewable and Sustainable Energy Reviews

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The sustainability of the global energy production systems involves new renewable energies and the improvement of the existing ones. Photovoltaic industry is growing thanks to the development of new technologies that increase the performance of photovoltaic systems. These systems are commonly subject to harsh environmental conditions that decrease their energy production and efficiency. In addition, current photovoltaic technologies are more sophisticated, and the size of photovoltaics solar plants is growing. Under this framework, research on failures and degradation mechanisms, together with the improvement of maintenance management, becomes essential to increase the performance, efficiency, reliability, availability, safety, and profitability of these systems. To assess maintenance needs, this paper presents a double contribution: an exhaustive literature review and updated survey on maintenance of photovoltaic plants, and a novel analysis of the current state and a discussion of the future trends and challenges in this field. An analysis of the main faults and degradation mechanisms is done, including the causes, effects, and the main techniques to detect, prevent and mitigate them.

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Section: Hot Spotsmentioning

confidence: 99%

“…[98] South Africa Inspection in darkness, laboratory, induced current. [99] Germany Process control, thermography. [100] China Simulation, impact of defects.…”

Section: Snow and Ice Depositionmentioning

confidence: 99%

Survey of maintenance management for photovoltaic power systems

Gonzalo

Marugán

Márquez

2020

Renewable and Sustainable Energy Reviews

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“…Therefore, not limited to pure shunt detection, this imaging technique has been successfully developed into a powerful tool for local and overall performance loss analysis of solar cells and modules . Its further practical application was extended to in‐line detection of the pre‐breakdown cells and interpretation of the physical parameters of the reverse characteristics of such cells . Furthermore, in and , it has been demonstrated that DLIT imaging through the glass substrates is possible what is of great importance for the non‐destructive investigation of encapsulation‐induced defects and degradation analysis of the modules integrated between glass panes.…”

Section: Measurement Techniquesmentioning

confidence: 99%

On the application of the vibrating Kelvin probe method for quality control of Cu(In,Ga)(Se,S)₂ thin‐film solar modules

Lavrenko

Marzinzig

Walter

et al. 2016

Progress in Photovoltaics

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In this contribution, the application possibilities of Kelvin probe mapping on Cu(In,Ga)(Se,S) 2 thin-film modules was explored and compared with dark lock-in thermography and electroluminescence imaging techniques. It has been shown that unlike any imaging technique, Kelvin probe measurements are able to detect spatial potential variations in both reverse and forward biases applied to a module and therefore to localize electrical defects and material inhomogeneities of a module, which are not visible to other characterization techniques. Moreover, Kelvin probe measurements under reverse bias conditions demonstrated a high sensitivity to variations of the reverse currents of the single diodes connected in series even under conditions where open-circuit voltage is not severely affected by inhomogeneities. Therefore, this mapping technique can be a valuable tool in a quality assessment process especially as an early warning tool in production.

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“…Various methods have been investigated for the detection of this fault, these methods are often based on the analysis of electrical [17,18] and non-electrical parameters [19,20] .…”

Section: Introductionmentioning

confidence: 99%